Warper



H. A. DAVIS Nov. 4, 1930.

WARPER 5, 1929 2 Sheets-Sheet 1 Filed Jan.

Inventor. Harry A. Daws 7 1; Anya Nov. 4, 1930. DAMS 1,780,891

WARPER Filed Jan. 3, 1929 2 Sheets-Sheet 2 Fig. 3.

Inventor. Harry A. Davis yH MMW Patented Nov. 4, 1930 UNITED STATES HARRY A. DAVIS, 01 HOPEDALE, MASSACHUSETTS, assrenon T0 DRAPER ooRroaA TION, 0F I-IOPEDALE, MASSACHUSETTS,A CORPORATION OF MAINE ,WA-RPER a ,Application filed January 3, 1929., Serial No. 330,096.

This invention relates to a warper for winding warp yarns drawn from asuitable supply such as a creel on to a warp beam of that type in which the warp beam rests against a driving drum and is rotated by the frictional engagement of the drum with the warp mass as the warps are wound on the beam. In this type of machine, the warp beam moves away from the driving drum as the warps are wound on the beam due to the increasing diameter of the warp mass.

The primary object of the invention is to provide a construction of this type which can be run at a high speed.- The great increase in speed being demanded by the trade has rendered it difiicult to control the winding operation so as to place the yarns under even tension in a homogeneous compact mass on the beam and has greatly increased the difficulty due to vibrationof the warp beam when thus rotated at high speed. The'present invention overcomes these difficulties and enables the desired results to be secured.

The'object' of the invention is furtherto provide means, and moreparticuiarly aca'nn controlled means, for applying to the warp beam during the winding operation anaddi tional res stance, and more particularly a frictional resistance, and for controlling the amount of additional resistance so applied to secure in correlation with the increasing total weight of the warp beam and yarn mass the desired resultant pressure of the beam on the driving drum and more particularly agradually decreasing resultant pressure.

The invention has for its furtherobjectto provide a simple and 'eflicient form of construction readily manufactured and readily embodied in the warper rendering it capable of high speed and producing a wound warp beam of the desired character;

These and other objects'and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed" out in the claims.

Since theinvention is concerned solely with the control of'the warp beam during the winding operation, the preventing of the jumping or vibration of the warp beam and the provisions for dotting the warp beam, and as the other features and mechanisms of the warper may be of any suitable construction and form, and as the general principle of operation of a warper is well known and familiar to those skilled in the art, it is only necessary here to illustrate and describe those portions of a warper directly concerned with ne preferred form of embodiment of the present invention. 1 1 3 In the drawings: 1

Fig. '1 is a side elvation of a warper with a simple and preferred form ofthe invention embodied therein and with elements'of the warper not concerned with the present inven: 1

tion omitted.

Fi .2 is a top plan View of the construetion shown in Fig. 1.

F ig. 3 is a side elevation on a larger scale of a portion of the construction shown in Fig. 1 with the parts shown in the position reached at the end of the winding operation. i, Fig. 4 is a detail chiefly in horizontal cross section taken onthe line 4 4; of F ig. .3.

' The warper comprises end' frames such as 1 standing on the floor 2. A shaftB is mount-- ed in suitable bearings 4 in the end frames and extends transversely of the'warper' and.

adjunctive devices over the roll 11 and are.

secured at their ends in any suitable manner to the barrel 6 of the warp beam. Consequently as the driving drum 5 1s rotated the frictionalengagement of the drum with the beam barrel rotates the. beam, winding the warp yarns thereon. The yarn mass on the warp beam therefore gradually increases in diameter until the beam is ffilled. Conse-v quently also the total weight of the beam and yarn mass likewise gradually increases.

' In the preferred construction, the supportingand controlling means for the warp beam 3 extends through; supports and rois driven at a high speed in anysuitable mangen.

is-the same at both sides of the warper so that.

f tion the supporting arms are held in fixed @beaingudgeons during the winding operaposition projecting forward of thewarper framejand with the upper surface 15 extend ing forward and upward in a convex curveof a character hereinafter described. The warp tion move along the supporting surfaces 15;

Preferably, as illustratedg the gudge'o'n' 8 r0 tates in a gudgeon block 16 mounted to slide on thesurface 15 and provided with a de pendingfin 17 slidingin a groove 18 formed I V- in the upper surface :of the arm '12- so as to 20 r e block.

frevent lateral movement of the gudgeon The convexcurved surfaces 15 of the supiporting arms 12 upon which the gudgeon blocks slidearedesigned according to the following principle; iThe total weight of the arp beam, the massof yarn thereonand, in

a fact anyweight or resistance tothe-inove- ,uiient ofthe beam away from the drum, may

ibe resolved into two component resultant 71 forces, one acting on a lineextendingthrough the gudgeonsperpendicular to thecurved j surfaces 15, and'the other acting one line extending from the gudge onstothe centerjof' y the i shaft It is desirable that-thetotal resultant;force eXerted by'the warp" beam on thedriving drum which occurs as pressure between the beam and the drum shall not in- V crease "during thewindingoperation and preferably. that it shall decrease from-the beginning of the winding operation. Withthis jqtotal resultant force thus decreasing from the beginning er the winding operation, it fol- 'lowst-hat the pressure between the warpbeam; V "'and'vthe 'driving'drum is" greatest at the bejginning of thewinding operation; This latyter'i result is desirable because it acts to com fpactlthe yarn in the desired mannerfion the beamand prevent the yarn froin bulging. out

{asit is wound onthe beam so-that asthe wind fing operation; proceedsfthe yarn is'p wound under a ,substantiallyqeven tension? in a homogeneous, properly compacted'mass'qi In the construction illustrated and preferably j'employed in connection with the "presenti-n: ,vention, fthetcurv'e'dsurface; 15 is so shaped thatthe total weight of' the-warp beam, the supports therefor, and; the yarn mass there-Q ion at all stages of'the winding operation, C0117 'c-sidered by itself and disregarding; the additional resistance hereinprovided to the more, inent" of the, warpfbeam' away from the 'driv in drum,"produces alsubstantially constant 7 V V resultant pr essure against v the driving drum in the direction of a.line 'eXtendingfrOm the gudgeon'tothe center of the shaft Asthis total weight factor and the diameter of the warp massareboth 'ascertainab-le at each stage of the winding operation, the curve of the surface 15 is readily plotted so as to give this substantially constant pressure force on the driving drum. And as-the lowermost position of the gudgeon' is determinediby the size of the warper, the size of the beam head, the desired clearance of the beam from the floor, etc, jand as the uppermost position of the gudgeon is also limited by sii nilar conditions, and as it is desirable that the curve of thesurface 15, for convenience in manufac- V ture, shall be acircular'arc, it will be found that the curve plotted in accordance with the foregoing principles can be made readily substantially tov coincide. with a circular are, eX-- tending between the extreme positions of the 1 warp beam gudgeon thusdeterminedr" ;A preferred form of the present. invention makes use'ofsuch a structure of warp beamJ support as that describediby means of which the warp beam and yarn mass thereon pro-s duce a substantially constant pressure on the driving drum, although such a structure in itself considered is not novelrwith-the presentinventor, The present invention cin :one aspect resides in the combi'nation with such a type of warp'beam support of means for pre-' senting an additional frictionalresistanceto 5 the movement of the beam away 1 fronr the jdrum, the effect of which, frictional. resistance upon the movement of theheam is automatical'ly varied as desired and preferably so as. to decrease gradually. from the beginning of:

thewinding operation so asi to secure "a con stant gradual decrease m the pressure between the -beamand the drum.

Another feature'ofth'e inventionresides the means, broadly considered, and rnore specifically in the form of a cam, for. auto;

creasing an additional-resistance to themovematically varyingf and I preferably, for debeam and irrespective of the means employed a for producing such resistance. I

; In-the friction-controlled means illustrated for iapply ing anfadditional resistance to the movement ofithe beam away from the drum,1the amount of friction developed; r'e- I V mains substantially constant throughoutj the 7 given winding-operation,- while the mechanism through which the resistance produced 7 by the friction mechanism, is presented to; the

movement of the beamacts tofvary asdesirjed the resistance to the movement of theibeam.

In the specific,constructionl' illustrated,

tion members are mounted in these arms. The fixed friction member is shown as a metal disc 22 having a hub 23 extending through the arm 21 and locked in place therein so as to be I rigid therewith by a set screw 24. This fixed friction member is provided with a suitable friction surface such as a disc 25 of leather secured thereto by rivets 26. A sleeve 27 extends through the other arm 20 in alignment with the hub 23 and on this stud is journalled the rotaryfriction member shown as a metal disc 28 having a hub 29 abutting the sleeve 27. Rotary movement isimparted to the rotary friction member from a cam 30 journalled on the hub 29 and having a pawl and ratchet connection with the rotary friction member. The cam 30 is held against movement away from the friction member by means of a collar 31 secured by a set screw- 32 to the hub 29. The ratchet portion of the connection between the cam and the friction member consists of ratchet teeth 33 formed on the faceof the disc28 of the rotary friction member. .The pawl is shown as a pin 34 mounted to slidein the end of the cam 30 parallel with the rotary axis of thefriction member. A helical spring 35 surrounds the pin 34 and is seatedatone end against the shoulder formed in the cam and bears at its other end against theshouldered head of the pin thus acting to force the head toward the ratchet teeth andthe head of the pin is provided with a pawl tooth 37 co-operating with the ratchet teeth 33.- The pin 34 is limited in its outward movement by a retaining pin 36 extending laterally through the end thereof and having movement in a slot 36 formed in the cam 30. The slot 36 serves also to prevent the pin 34 from rotating. e t

A stud 38 extends through the sleeve 27, thehub 29 andithe hub 23, thus securing them in axial alignment. At its inner end thisstud is provided with a reduced threaded section 39. A washer 40 surrounds the thread ed sect-ion 39 and rests against the end of the hub 23 of the fixed friction member and lock nuts 41 are mounted on the threaded section 39. At its opposite end the. stud 38 is pro- A lever 43.

vided with a reduced section 42. having a bifurcated cam head44 is pivoted at 45011 the end of this reduced portion. A helical spring 46 surroundsthe reduced section 42 and extendsbetween twowashers, one 47 seated against the endof the sleeve 27 andthe ether 48 seated against the bifurcated cam head 44.; The body of the stud 38 is of such length. that. it does not reach to the end of the;

hub 23 or the end of the sleeve 27. There is thus provided a simple and efficient means drawn together against the tension of the spring 46 to any desired degree. By swinging the lever 43 180 from the position shown 7 in the drawings, the tension of the spring and consequently the frictional resistance be tween the two friction members is relieved.

Lugs 49 projecting from the face of the arm 20 of the bracket 19 serve to position the lever locking. position.

A. flexible connector shown as a chain 50 extends from the beam gudgeon 8 around, and is secured to, the'cam 30. In the construction illustrated, the lower end of this connector 50 is shown as attached to a stud 51 threaded into the peripheral cam face of the cam 30 where the cam is of maximum radius; The upper end 52 of the connector 50 is secured to a cylindrical casing 53- enclosing a spring 54. An eye member 55' tits over a grooved collar 56 on the gudgeon 8 and has its stem 57 passing into the casing 53 and carrying a nut 58 threaded thereon beneath the spring.

The pawl tooth and the ratchet teeth 33 preventing jumping or vibration of'the warp I beam will be apparent from the foregoing de scription. In Fig. 1 the parts are shown at: the beginning oi the winding operation and in F 3 at the end-of the winding operation.

To place the parts in the former position, the lever 43 is rocked to releasethe spring 46 and the cam 30 is turned counter-clockwise and preferably so as to place the spring'54 under tension with the fiexibleconnector 50 connected to the gudgeon 8. The nuts 41 are adjusted to give the required tension in thespring 46 and the lever 43 is placed in its-locked position. The peripheral cam surface of the cam '30 is so shaped-that in this position the efiectiveleverage ofthe connector 50 act-- ing to'rotate the cam is on the 11111111311111 radius ofthe cam and in the position shown at the end or the windingoperation in Fig. 3 is on a maximum radius of the cam, although this facemay be shaped to give any desiredres-ult.

In the construction illustrated, as the windmg operation proceeds and the beam gudgeoii 8nioves from the position shown in Fig. 1 to that shown-in Fig. 3, the flexible connector 50,

acting through the gradually varying lever-,7 age radius of the cam 30, and in thiscase through a gradually increasing leverage ra dius, rotates thecamand therewith by reason of the pawl and ratchet connection, the

rotary friction member, thus presenting the required resistance to movement of the "beam."

by the-tensionof the spring46;but the effect ofthis constant'resistance upon thebeamguch geo iisdetermined by the shape of the cam '30 and in this case i'sia gradually diminishing creases.

sista'n ce maybesocorrelated with the gradually increasing totalrweight-of the beam and yarn massand the'curvatureofthe armssupporting-'the beam gudge'ons as to secure an'yc desired result and in particular to secure a slight decrease in the total resultant pressure oft-he beam on the driving drum'fromthe" beginning of the'winding operation so as to compact the yarn mass and prevent it from i i bulging, '-.--part-icularly during the earlier st'agesof the winding operation.

The spring 54interposed in the connector or bet-Ween the bea-m and the frictional resistance preferablystandsin a state of dis-- tortion' during the movement of the beam.

Whether, it be the normal movement along the supporting arms or an abnormal movement duerto umpmgor vibration, and thus acts to absorb by achange in its degree of dis- -the frictional resistance as would occur if tortion'any such abnormal changes in" the force exerted by-thebeam inoppositio'n to the, beam'jumped or vibrated.

V -WVhen it'is' desi'red todeft the-beam, thef supporting arms 12am swung downwardlyabout-the pivots 1-3 under the control of any usual' and suitable mechanism and; such downward movement at once acts to A relieve the tenslonon'the connectors because, after the springs 5 "'haveexpandedg there'is nofurther tendency to; a pullon theconnectors 1 maths eye'members may'lthen readily be Y liftedfofh fromthe collar-s on'the beam gud e .geons, 1 Or, ifdesired',-before?the supporting arms-are lowere d,- the lever dm'ay be re-. leased, thus releasing thefrictional resistance. "It will be noted that'when the'supporting j I arms are lowered w den the -bea m,- thepresi-' I sure on the beam is completely; relieved, the

' springs 54'jare'restored to undistorted form, the fiexible"connectors or'ichainsislackem'the frictional resistance between the friction "members is no longer transmitted tothebeam and 'c'on'sequently the eye members 55 maybe lifted from the beam gudgeonsflea'ving the 1 beam free tobe removed fromfthe supporting arms", an it will be noted that this all takes placef;without any disturbance-of the adjustment of the friction members. So I also, with the'supporting arms in their lower if position, a fresh beam may} readily beput, in 5 place; thereon and; the "flexible connectors readilyattached thereto, inthe specific form illustrated, by'again placing theeye H1 Illber's 5'5'gov'eril'the beain gudge'ons. Then; when: the supporting-armscare "raised, the;

'efiici-entmechanism for controlling the warp i and means for: presenting a gradually de} creasing resistance to} tl1e movemento-f-the V beamas the yarn is-woundr on-the beam in c addition to that resulting from'anyweight; 1

iof or carried by the beam.--

desired tension is automati'cally?applied.

Aninitia-l pressure may beiapplied, if -de-i sired, to compressthesprings 54-to-the del sired extent by rotating the cam 30' to ar-n'ew' position whereit 'willbe held by the pawl and ratchet 37- and' 33'. This also'may )be done without disturbingfany predetermined frictional resistance of the frictionfmembers; There isthuspresented a verysimpleand beam" during the winding'operation in a high speed jwarpen' v Having thus described the. invention,"

Ywhatisclaimed as neW,*a-nd desiredto be '1, 'A- warper compr sing-adrlvlngdrum, a warp jbeainsupported" to restagamsti the" secured by Letters'Patent is: f

drum and to moveawayfrom the: drunr'as tional engagement "of the drum therewith,

means acting toj'causethe resu'ltant pressu'ref g on the drum fromtlie'beam due to weight to remain substantially constant as the yarn is wound on cthe-1beam,'and"means'for-preresistance to. the-fmovement of the "beam' as senting a gradually decreasing additional means acting in"con-j'unctionto efi'ectfga grad i i ually decreasing tot-a1 :resultant pressure of the beam on thedrum' to compactiand pre+ vent 'bulging'ofthe yarn: mass as the yarn is wound on the beam andto prevent; the

beam from j mpi When1;.rotated"atjhi gh speed. v

2- A warp'er comprising a; driving drum,

the yarnis'wound on'the beam by the fric-j' means acting to cause; the 'resiiltant pressure on theydrum from the beam du'e to 'weight to "remain substantially constant 1 as the fyarn is woundon the beam, andflmeansfor pre- 7 sentmg an additional resistfanceto the movementof the be'amya'rying in a predeter- 8. A warper comprising a driving drum",

tional 1 engagement of the drum therewith 4. A arps comprising a afl, driving? drum,

the yarnis woundonthe beamfby the fric tionalifengagementf of the drum therewith,

means for 'presentingijaj continuous resist? we," a warp:beam supportedfto rest against-the 17 druma and 'to move awayfrom the drum' as mined degree as the yarnis woundonfithe f beamto elfecta-predeterminedvariationin r the ,totalresultant pressure'of: the'ibeam on" v I he H a v a warp beamfsupportedjto rest against the drumjand'to move away'fiom the drum as the yarn is wound on the "beainfby thefric 1 ance to the movement of the beam as the yarn is wound on the beam in addition to that resulting from any weight of or carried by the beam, and yielding means interposed between the beam and said resistance and standing in a state of distortion during both the normal and any abnormal movement of the beam and acting to absorb by change in degree of distortion abnormal changes in the force exerted by the beam in opposition to said resistance.

5. A warper comprising a driving drum, a warp beam supported to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, means acting to cause the resultant pressure on the drum from the beam due to weight to remain substantially constant as the yarn is wound on the beam, means for presenting an additional resistance to the movement of the beam as the yarn is wound on the beam, and a spring element interposed between the beam and said resistance and standing in a state of distortion during both the normal and any abnormal movement of the beam and acting to absorb by change in degree of distortion abnormal changes in the force exerted by the beam in opposition to said resistance.

6. A warper comprising the construction defined in claim 2, together with a spring element interposed between the beam and said resistance and standing in a state of distortion during both the normal and any abnormal movement of the beam and acting to absorb by change in degree of distortion abnormal changes in the force exerted by the beam in opposition to said resistance.

7. A warper comprising the construction defined in claim 4:, together with a spring element interposed between the beam and said resistance and standing in a state of distortion during both the normal and any abnormal movement of the beam and acting to absorb by change in degree of distortion abnormal changes in the force exerted by the beam in opposition to said resistance.

8. A warper comprising a driving drum, a warp beam having gudgeons movably supported to cause the beam to rest against the drum and to move away from the drum as the yarn is wound on the beam by frictional engagement of the drum therewith, cooperating fixed and rotary friction members at each end of the beam, a cam secured to and rotatable with each rotary friction member, and a flexible connector extending from each beam gudgeon around and secured to the corresponding cam whereby the said cams act as the beam moves during the winding of the yarn thereon to vary the leverage radius between the connectors and the rotary friction members and consequently the resistance to the movement of the beam.

9. A'warper comprising the construction defined in claim 8, whicheachcam is ournalled coaxially with and independently of the corresponding rotary friction member, together with a pawl and ratchet connection between each cam and said rotary friction member acting-to secure the said parts together during the movement of the beam as the yarn 1s wound thereon.

10. A warper comprising theconstruction i defined in claim 8, together with springs for forcing the fixed and rotaryffriction members into frictional engagement and means for ad usting the tension of sald springs to adjust the frictional resistance between said members. i 1 i v i 11. A warper comprising a-driving drum, a warp beam having gudgeonsmovably supported to cause the beam to rest against the drum and to move away from the drum, as the yarn is wound on the beam by, the frictional engagement of the drum therewith, a, cam device pivotally mounted on the warper frame beneath each end of the beam, a fie'xible connector connected to each beam gudgeon and extending downwardly therefrom and connected to thecam device, and means for applying a constant resistance to the rotary movement of the cam devices on their pivots, the-said cam devices acting gradually to decrease the amount of said resistance ion and connected to he cam device, and means for applying a constant resistance to the roe tary movement of the cam devices on their pivots, the said cam devices acting gradually to decrease the amount of said resistance transmitted to the beam gudgeons during the winding operation. 13. Awarp'er comprising a driving drum, a pair of'supporting arms mounted for vertical movement and extending forward of the drum, a warp beam having gudgeons movably supported by the arms to cause the beam to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the yarn therewith. a frictional resistance means, and a flexible connectordetachably connected to each beam gudgeon and extending therefrom to said frictional resistance means and acting to transmit a continuous re- 1 silo the supporting armsto doff the beam acting'to relieve'the flexible connectors of strainand permitfl theirready' disconnection frorn the I b m g eonso j x p lfL Awarpercompris'ingthe construction defined in claim. '13, together with means for adjusting the frictional resistance means to I varyttheresistancethereof as desired and which, when the supporting arm'sare lowered to dofl the beam, the saidspring' elements are r in which the said'adjustment is not disturbed jbythe lowering of the supporting'arms to dofl'the'beam. V

j 15. A Warper; comprising the construction :defined inclaim 13",f-together with a spring element interposed inreach flexible connector and standing in a state of distortion during the normal movement of the. beamand in restored to undistorted condition.

' :16; A Warper comprising the construction 1 defined in claim 13 together with a pawl and j ratchet connection'between reach flexible connector and the said frictional resistance r means to enable the connectors to bertaken up i when a new beam ,is'placed in position on thef'supporting'arlns and Without disturbing i I the frictional resistance of the frictional resistance means.

7' r {17. A;warper comprising the construction definedin claim 13, together with'means for adjllStlllg the fr ctlonal resistance means to Vary the amount of resistance afforded there.- v V by, and a pawl and 'ratchet means between each flexible connector and said 'frictionalresistance-means' to enable f the flexible con? nect'orsatobetaken up with-out disturbing I the adjustments of the frictional re mean -n a 7 18. A warper'comprising the construction definedin claim 13,- together with a spring 7 interposed in each flexible connector, means for adjusting the'frictional resistance means to vary the amountof resistance afforded thereby, and a pawl and ratchet meansbeftween each flexible connector and said frictional resistance means to enable, the flexible connectors tobe takennup and the springsto be} distorted without disturbing the adjust inent of the frictional resistance means.

a In testimony whereof I have, signed my memento thlsspeclfication.

HARRY A. DAVIS...

sistance. 

